Phthalonitrile

  • 1,2-Dicyanobenzene
  • 1,2-Benzenedicarbonitrile
  • o-Dicyanobenzene
Formula
C6H4-1,2-(CN)2
Structure
Description
Buff-colored crystals, slightly aromatic odor.
Uses
Intermediate in organic synthesis, esp pigments & dyes, base material for high temp lubricants & coatings.

Registry Numbers and Inventories.
CAS
91-15-6
EC (EINECS/ELINCS)
202-044-8
EC Class
toxic
R 24/25
S 22 36/37 45
RTECS
TI8575000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen
UN (DOT)
2811
Beilstein/Gmelin
775028
Beilstein Reference
4-09-00-03268
Swiss Giftliste 1
G-4876
Canada DSL/NDSL
DSL
US TSCA
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H4N2
Formula mass
128.13
Melting point, °C
138 - 141
Boiling point, °C
305
Vapor pressure, mmHg
0.001 (25 C)
Saturation Concentration
65.8 ppm (0.007%) at 20 C (calculated)
Density
1.1 g/cm3 (20 C)
Solubility in water
Slightly soluble
Partition coefficient, pKow
1.25
Heat of vaporization
54.5 kJ/mol
Heat of combustion
-280.6 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a cool, dry area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Use only in a chemical fume hood. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Disposal code
9
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, strong reducing agents, strong acids, strong bases.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, cyanide fumes.

Fire.
Flash Point,°C
154
Autoignition, °C
> 580
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
2
Exposure effects
   Ingestion
Harmful if swallowed. May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation. May cause irritation of the mucous membranes.
   Skin
Causes skin irritation. Substance is readily absorbed through the skin.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
HS Code
2926 90 95